.eslintrc.json

{
  "parser": "babel-eslint",

  "extends": "airbnb-base",

  "env": {
    "node": true,
    "es6": true,
    "mocha": true
  },

  "parserOptions": {
    "sourceType": "module",
    "allowImportExportEverywhere": false
  },

  "settings": {
    "import/resolver": {
      "babel-module": {}
    }
  },

  "rules": {
    "semi": ["error", "never"],
    "semi-spacing": ["error", {
      "before": false,
      "after": true
    }],
    "space-before-blocks": ["error", "always"],
    "space-unary-ops": ["error", {
      "words": true,
      "nonwords": false
    }],
    "template-curly-spacing": ["error", "never"],
    "class-methods-use-this": ["off"],
    "no-use-before-define": ["error", {
      "functions": false,
      "classes": false
    }],
    "arrow-parens": ["error", "as-needed", {
      "requireForBlockBody": false
    }],
    "comma-dangle": ["error", "never"],
    "eol-last": "off",
    "prefer-destructuring": ["error", {
      "object": false,
      "array": false
    }],
    "no-restricted-syntax": ["error", "ForInStatement", "LabeledStatement", "WithStatement"],
    "max-len": ["error", {
      "code": 160
    }]
  }
}